The most recent discovery about Stonehenge. From the National Post:

Stonehenge bluestones were dragged 240 km over land from quarry in Wales, study finds

‘You could actually see the hole left from where the stone pillar had been removed. Just amazing’

Stonehenge: one of the wonders of the ancient world, but also the elusive megalith that leaves scientists and people ruminating on its purpose. Discoveries by a team of archeologists and geologists suggest the transportation of the bluestones from the Preseli hills in Wales to Stonehenge in England was an effort to unify tribes of prehistoric Britain.

In the team’s excavations, they pinpointed the exact origins of the bluestones that line the inner and outer perimeter of the sarsen trilithons — the tall, three-stoned structure that people usually envision when thinking of Stonehenge.

The location of the quarries, where the bluestones originate, now nullifies a pre-existing theory that suggested they were transported by sea from Milford Haven to the Salisbury Plains. Nearly 5,000 years ago, the Neolithic humans dragged the bluestones 240 km over land, according to the study published in Antiquity.

More at the link.